US7357127B2 - Method for determining the air mass in a cylinder - Google Patents
Method for determining the air mass in a cylinder Download PDFInfo
- Publication number
- US7357127B2 US7357127B2 US11/629,371 US62937105A US7357127B2 US 7357127 B2 US7357127 B2 US 7357127B2 US 62937105 A US62937105 A US 62937105A US 7357127 B2 US7357127 B2 US 7357127B2
- Authority
- US
- United States
- Prior art keywords
- air mass
- characteristic curve
- pressure
- cylinder
- intake pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
- F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1448—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an exhaust gas pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
- F02D41/182—Circuit arrangements for generating control signals by measuring intake air flow for the control of a fuel injection device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
- F02D2041/001—Controlling intake air for engines with variable valve actuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0402—Engine intake system parameters the parameter being determined by using a model of the engine intake or its components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0406—Intake manifold pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to a method for determining the air mass in a cylinder of an internal combustion engine with a supercharging device and a facility for variable activation of the valve overlap of the gas exchange valves.
- a cylinder air charge controller is known from DE 100 50 059 A1, which adjusts inlet and outlet valves as a function of a required torque.
- the control device for inlet and outlet valves should be opened at the same time to prevent the delay in the torque increase, such that where there is a positive pressure difference between the intake and exhaust gas sides, there is a purging of intake air to the exhaust gas side.
- a method for controlling an engine is known from DE 100 51 416 A1, which has an electronically controlled inlet and outlet device.
- the outlet regulator is used to control the air flow from the intake manifold into the cylinder.
- An engine control system for a direct injection unit with variable valve control time is known from DE 100 51 425 A1, in which fresh air charging into the cylinder is controlled more rapidly with the aid of a cam controller.
- the method also includes changing the air/fuel ratio in the cylinder and changes the activation of the outlet control device accordingly.
- a manifold pressure sensor is provided to compensate for incorrect calculations and calculates a pressure error from the difference between the determined manifold pressure and the current manifold pressure.
- a direct-injection internal combustion engine with a turbocharger to reduce consumption, particularly in full-load operation is known from EP 1 243 779 A2.
- residual gas is purged from the cylinder, in that the gas exchange valves are opened at the same time.
- the object of the invention is to provide a method for determining the air mass in a cylinder of an internal combustion engine, which determines the air mass available to the cylinder reliably using simple means.
- the inventive method relates to internal combustion engines with a supercharging device, for example an exhaust gas turbocharger, and a facility for variable activation of a valve overlap of the gas exchange valves.
- the inventive method operates with at least two characteristic curves.
- the first characteristic curve shows the air mass in the cylinder as the first reference characteristic curve, describing a linear relationship between the air mass in the cylinder and the pressure in the intake pipe as a function of the operating conditions. If the intake pipe pressure exceeds the exhaust gas counterpressure, a value for the trapping efficiency is determined based on a second characteristic curve and used to correct the value of the air mass from the reference characteristic curve.
- the air mass in the cylinder is described by a linear relationship between the air mass and the pressure in the intake duct. The air values are corrected with the aid of the trapping efficiency [lacuna] purging, in other words in the region where the intake pressure is greater than the exhaust gas counterpressure.
- the trapping efficiency (TE) is preferably defined as follows:
- m cyl is the air mass remaining in the cylinder after the charge exchange and m eng is the total air mass leaving the cylinder during the charge exchange.
- the ratio of these air masses is particularly suitable for characterizing the purge effect in the cylinder.
- the value from the reference characteristic curve is corrected by multiplication.
- the value of the air mass from the reference characteristic curve is corrected using a value for the residual gas remaining in the combustion chamber.
- the air mass is defined for the residual gas in a characteristic curve as a function of operating conditions over the pressure in the intake duct, such that the value for the residual gas is subtracted from the reference characteristic curve to correct the value.
- the characteristic curve for the air mass of the residual gas preferably runs below a predetermined pressure value in a manner that is essentially proportional to the intake pipe pressure.
- At least one of the additional operating conditions, of which the characteristic curve for the trapping efficiency and/or the residual gas is a function, is selected from the following group:
- the value for the trapping efficiency is forwarded to a control unit for calculation of the torque and/or ignition correction. It has proven particularly advantageous for the value for the air mass in the cylinder and the correction value defined by purging to be forwarded separately to lower-order control units, instead of a corrected value for the air mass in the cylinder directly.
- FIG. 1 shows a schematic view of an internal combustion engine
- FIG. 2 shows the pattern of the air mass flowing into a cylinder as a function of the intake pipe pressure.
- FIG. 1 shows an internal combustion engine 10 with one cylinder 26 .
- Fresh air is taken in by way of an intake duct 12 , the temperature (T AL ) of said fresh air being captured by way of a temperature sensor 14 .
- the incoming air mass is measured for example using an air mass sensor 16 .
- a pressure sensor as the load sensor instead of the air mass sensor, said pressure sensor being positioned between a throttle valve 18 and an inlet valve 22 .
- the throttle valve 18 controls the air mass flow into the inlet duct 12 , with a sensor 20 capturing the angular position of the throttle valve for more precise regulation.
- the fresh air enters the inner chamber 24 of the cylinder by way of the inlet valve 22 .
- the cylinder 26 is illustrated schematically and has a piston 28 with a connecting rod 30 , which drives the crankshaft 32 .
- the rotation speed of the crankshaft is captured by a speed sensor 34 .
- Fuel injection is not shown in further detail in the figures.
- the injected fuel is ignited by way of the ignition facility 36 .
- the residual gas is released by way of the outlet valve 38 into the exhaust gas duct 40 .
- a lambda probe 42 measures the oxygen contained in the exhaust gas in the exhaust gas duct.
- the internal combustion engine is controlled by way of an engine controller 44 , at which the rotation speed N, the throttle valve angle ⁇ DK , the oxygen content ⁇ AV and the ambient temperature T AL of the fresh air taken in are for example present as input variables.
- the measured value for the fresh air taken in dm HFN /dt is also present at the engine controller 44 .
- FIG. 2 shows the model approach to the air mass flow into the cylinder as a function of the pressure in the intake pipe (MAP). If the pressure in the intake pipe is less than the exhaust gas counterpressure, the values in the interval A in FIG. 2 result. If the intake pipe pressure is greater than the exhaust gas counterpressure, the pressure values are in the interval B.
- FIG. 2 shows a standard absorption characteristic curve 46 , describing the linear relationship between the air mass in the cylinder (MAF 0 and the pressure in the intake pipe (MAP). The standard absorption characteristic curve 46 does not take into account the effects occurring due to valve overlap.
- FIG. 2 shows the result 50 of the correction.
- the air mass MAF has an essentially linear pattern as a function of the intake pressure MAP, said pattern showing the same slope as the standard absorption characteristic curve 46 .
- the mass of air remaining in the cylinder is above the standard absorption characteristic curve 46 .
- the values of the air mass 52 here have an essentially linear pattern, parallel to the standard absorption characteristic curve 46 .
- the increase 54 due to the air mass remaining in the combustion chamber as a result of purging can be different from the air mass occurring in the interval A, which lowers the standard absorption characteristic curve 46 .
- the corrected curve has an essentially non-linear, S-shaped pattern.
- the trapping efficiency is recorded by way of characteristic maps as a function of the position of the valve drive, the engine speed, the intake pipe pressure and the exhaust gas counterpressure.
- the trapping efficiency and then the exhaust gas counterpressure may or may not be taken into account during the determination.
- the trapping efficiency (EFF_TRAP) is a function of the engine speed N, the valve overlap VO, the exhaust gas counterpressure PRS_EX, the intake pipe pressure MAP and a selector switch LC_PRS_EX_SCAV_CCC_ENA, which indicates whether the exhaust gas counterpressure is included in the calculation.
Abstract
Description
- rotation speed,
- valve control times and
- ambient temperature and/or pressure.
Claims (9)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004030604A DE102004030604B3 (en) | 2004-06-24 | 2004-06-24 | Method for determining the air mass in a cylinder |
DE102004030604.4 | 2004-06-24 | ||
PCT/EP2005/051438 WO2006000474A1 (en) | 2004-06-24 | 2005-03-30 | Method for determining the air mass in a cylinder |
Publications (2)
Publication Number | Publication Date |
---|---|
US20070227500A1 US20070227500A1 (en) | 2007-10-04 |
US7357127B2 true US7357127B2 (en) | 2008-04-15 |
Family
ID=34967612
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/629,371 Expired - Fee Related US7357127B2 (en) | 2004-06-24 | 2005-03-30 | Method for determining the air mass in a cylinder |
Country Status (4)
Country | Link |
---|---|
US (1) | US7357127B2 (en) |
EP (1) | EP1759105B1 (en) |
DE (2) | DE102004030604B3 (en) |
WO (1) | WO2006000474A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105408604A (en) * | 2013-08-14 | 2016-03-16 | 大陆汽车有限公司 | Method and device for operating an internal combustion engine |
US10774757B2 (en) | 2016-03-18 | 2020-09-15 | Volkswagen Aktiengesellschaft | Method and controller for determining the quantity of filling components in a cylinder of an internal combustion engine |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4673818B2 (en) * | 2006-10-26 | 2011-04-20 | トヨタ自動車株式会社 | Control device for turbocharged internal combustion engine |
JP5379918B1 (en) | 2013-01-11 | 2013-12-25 | 三菱電機株式会社 | Control device for internal combustion engine |
DE102014001790A1 (en) | 2014-02-12 | 2015-08-13 | Fev Gmbh | Determination of the degree of delivery of turbocharged gasoline engines in scavenging |
JP6156429B2 (en) * | 2014-05-26 | 2017-07-05 | トヨタ自動車株式会社 | Control device for internal combustion engine |
DE102015210761A1 (en) | 2015-06-12 | 2016-12-15 | Volkswagen Aktiengesellschaft | Air charge determination, engine control unit and internal combustion engine |
DE102017108995B3 (en) | 2017-04-27 | 2018-06-14 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Method and device for operating an internal combustion engine with a purging charge cycle |
US10221794B1 (en) * | 2017-11-07 | 2019-03-05 | Fca Us Llc | Measurement, modeling, and estimation of scavenging airflow in an internal combustion engine |
Citations (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4269156A (en) * | 1979-05-01 | 1981-05-26 | The Bendix Corporation | Air/fuel ratio management system with calibration correction for manifold pressure differentials |
US4404946A (en) * | 1979-09-27 | 1983-09-20 | Ford Motor Company | Method for improving fuel control in an internal combustion engine |
US4941448A (en) * | 1987-09-22 | 1990-07-17 | Japan Electronic Control Systems Co., Ltd. | Fuel supply control system for internal combustion engine with improved response characteristics to variation of induction air pressure |
DE4325902A1 (en) | 1993-08-02 | 1995-02-09 | Bosch Gmbh Robert | Air charge calculation method for an internal combustion engine with variable gas exchange control |
EP0651149A1 (en) | 1993-10-30 | 1995-05-03 | Bayerische Motoren Werke Aktiengesellschaft | Controlling the amount of injected fuel depending on the air-flow into the cylinders |
EP1041264A2 (en) | 1999-04-01 | 2000-10-04 | Bayerische Motoren Werke Aktiengesellschaft | Hybrid model for the modelling of a whole process in a vehicle |
DE10051416A1 (en) | 1999-10-18 | 2001-05-10 | Ford Global Tech Inc | Computer program speed control for internal combustion engine, controls, e.g. by electronic throttle, intake manifold flow into engine cylinders, to achieve desired engine speed and torque |
DE10051425A1 (en) | 1999-10-18 | 2001-05-10 | Ford Global Tech Inc | Engine control system and method for a direct injector with variable valve timing |
DE10050059A1 (en) | 1999-10-18 | 2001-06-21 | Ford Global Tech Dearborn | Vehicle engine control method controls cylinder air charge faster than manifold dynamics by co-ordination of inlet and outlet device |
EP1231372A2 (en) | 2001-02-13 | 2002-08-14 | MAGNETI MARELLI POWERTRAIN S.p.A. | "Method for estimating the filling of a cylinder in an internal combustion engine" |
EP1243779A2 (en) | 2001-03-23 | 2002-09-25 | Hitachi, Ltd. | Direct-injection engine with turbocharger and method of controlling the same |
US6675579B1 (en) * | 2003-02-06 | 2004-01-13 | Ford Global Technologies, Llc | HCCI engine intake/exhaust systems for fast inlet temperature and pressure control with intake pressure boosting |
DE10259052B3 (en) | 2002-12-17 | 2004-04-01 | Siemens Ag | Heating method for exhaust catalyzer of direct fuel injection IC engine for automobile using increased exothermy in catalyzer for accelerated heating during cold-starting |
DE10316291B3 (en) | 2003-04-09 | 2004-11-11 | Siemens Ag | Method for controlling an internal combustion engine |
US6840237B2 (en) * | 2002-12-30 | 2005-01-11 | Ford Global Technologies, Llc | Method for auto-ignition operation and computer readable storage device |
DE102004050059A1 (en) | 2004-10-14 | 2006-04-27 | Robert Bosch Gmbh | Method and device for releasing a brake assist function in a motor vehicle |
US20070062490A1 (en) * | 2005-09-21 | 2007-03-22 | Jialin Yang | System and method for maintaining heated intake air |
-
2004
- 2004-06-24 DE DE102004030604A patent/DE102004030604B3/en not_active Expired - Fee Related
-
2005
- 2005-03-30 DE DE502005009136T patent/DE502005009136D1/en active Active
- 2005-03-30 US US11/629,371 patent/US7357127B2/en not_active Expired - Fee Related
- 2005-03-30 EP EP05742928A patent/EP1759105B1/en not_active Expired - Fee Related
- 2005-03-30 WO PCT/EP2005/051438 patent/WO2006000474A1/en not_active Application Discontinuation
Patent Citations (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4269156A (en) * | 1979-05-01 | 1981-05-26 | The Bendix Corporation | Air/fuel ratio management system with calibration correction for manifold pressure differentials |
US4404946A (en) * | 1979-09-27 | 1983-09-20 | Ford Motor Company | Method for improving fuel control in an internal combustion engine |
US4941448A (en) * | 1987-09-22 | 1990-07-17 | Japan Electronic Control Systems Co., Ltd. | Fuel supply control system for internal combustion engine with improved response characteristics to variation of induction air pressure |
DE4325902A1 (en) | 1993-08-02 | 1995-02-09 | Bosch Gmbh Robert | Air charge calculation method for an internal combustion engine with variable gas exchange control |
EP0651149A1 (en) | 1993-10-30 | 1995-05-03 | Bayerische Motoren Werke Aktiengesellschaft | Controlling the amount of injected fuel depending on the air-flow into the cylinders |
EP1041264A2 (en) | 1999-04-01 | 2000-10-04 | Bayerische Motoren Werke Aktiengesellschaft | Hybrid model for the modelling of a whole process in a vehicle |
DE10050059A1 (en) | 1999-10-18 | 2001-06-21 | Ford Global Tech Dearborn | Vehicle engine control method controls cylinder air charge faster than manifold dynamics by co-ordination of inlet and outlet device |
DE10051425A1 (en) | 1999-10-18 | 2001-05-10 | Ford Global Tech Inc | Engine control system and method for a direct injector with variable valve timing |
DE10051416A1 (en) | 1999-10-18 | 2001-05-10 | Ford Global Tech Inc | Computer program speed control for internal combustion engine, controls, e.g. by electronic throttle, intake manifold flow into engine cylinders, to achieve desired engine speed and torque |
EP1231372A2 (en) | 2001-02-13 | 2002-08-14 | MAGNETI MARELLI POWERTRAIN S.p.A. | "Method for estimating the filling of a cylinder in an internal combustion engine" |
EP1243779A2 (en) | 2001-03-23 | 2002-09-25 | Hitachi, Ltd. | Direct-injection engine with turbocharger and method of controlling the same |
DE10259052B3 (en) | 2002-12-17 | 2004-04-01 | Siemens Ag | Heating method for exhaust catalyzer of direct fuel injection IC engine for automobile using increased exothermy in catalyzer for accelerated heating during cold-starting |
US6840237B2 (en) * | 2002-12-30 | 2005-01-11 | Ford Global Technologies, Llc | Method for auto-ignition operation and computer readable storage device |
US6675579B1 (en) * | 2003-02-06 | 2004-01-13 | Ford Global Technologies, Llc | HCCI engine intake/exhaust systems for fast inlet temperature and pressure control with intake pressure boosting |
DE10316291B3 (en) | 2003-04-09 | 2004-11-11 | Siemens Ag | Method for controlling an internal combustion engine |
DE102004050059A1 (en) | 2004-10-14 | 2006-04-27 | Robert Bosch Gmbh | Method and device for releasing a brake assist function in a motor vehicle |
US20070062490A1 (en) * | 2005-09-21 | 2007-03-22 | Jialin Yang | System and method for maintaining heated intake air |
Non-Patent Citations (1)
Title |
---|
E. Bach, "Verbrennungsmotoren Lehrbrief 7, Leistungssteigerung von Verbrennungsmotoren", Oct. 16, 2002, pp. 1-61, Hochschule für Technik und Wirtschaft, Dresden (FH). |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105408604A (en) * | 2013-08-14 | 2016-03-16 | 大陆汽车有限公司 | Method and device for operating an internal combustion engine |
US9739217B2 (en) | 2013-08-14 | 2017-08-22 | Continental Automotive Gmbh | Method and device for operating an internal combustion engine |
CN105408604B (en) * | 2013-08-14 | 2017-12-01 | 大陆汽车有限公司 | Method and apparatus for operating internal combustion engine |
US10774757B2 (en) | 2016-03-18 | 2020-09-15 | Volkswagen Aktiengesellschaft | Method and controller for determining the quantity of filling components in a cylinder of an internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
DE102004030604B3 (en) | 2006-02-09 |
EP1759105B1 (en) | 2010-03-03 |
WO2006000474A1 (en) | 2006-01-05 |
EP1759105A1 (en) | 2007-03-07 |
DE502005009136D1 (en) | 2010-04-15 |
US20070227500A1 (en) | 2007-10-04 |
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ITUTE | Technology Status Assessment |
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